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Injector and cam options

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Old 06-29-2015, 03:17 PM
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Car: 92 firebird gta
Engine: L98 with minor mods.
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Injector and cam options

I have 92 gta l98. I bought a hsr intake and fuel rail kit. Set of afr 195cc. eliminator heads. the heads springs are good up to .600 hydro roller. I have a 3600 10 in stall converter. The car has a 323 posi. rear. The questions I have is what size injectors do I need to run ? What would be a good cam to run? I like the sound of a big cam( my carb. 89 with 355 has a 565 lift solid roller in it and runs very good it's hard on gas though). I want it to run strong and not be to hard to tune. I am looking for a low 12 sec. car. The rpm range no higher than 6500. Thanks. in advance for any help.
Old 06-29-2015, 07:41 PM
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Re: Injector and cam options

You need to finalize your cam choice before you buy injectors.
What ECM will you be using?
Old 06-29-2015, 11:05 PM
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Re: Injector and cam options

Do you know how to tune your EFI on your own? If not, be careful on how big a cam you get.

I had a 400sbc, with a LT1 intake(mini ram)with afr 195's, LT headers, and a 280xfi comp cam. I ran 12.11@111 n/a.
After learning how to burn chips, I know I could have squeaked a couple more tenths out of it. But I spun a main bearing on that engine.

If you have a 350, a 268xfi would probably be a good fit.
Old 06-30-2015, 07:10 AM
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Re: Injector and cam options

Originally Posted by LB9GTA
Do you know how to tune your EFI on your own? If not, be careful on how big a cam you get.


If you have a 350, a 268xfi would probably be a good fit.

If the budget permits, NEVER cam your motor to the ECM. Get the best cam for the combination, not what the ECM will handle. Then get an ECM that best suits the build from there.
Old 06-30-2015, 07:14 AM
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Join Date: Aug 2009
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Car: 92 firebird gta
Engine: L98 with minor mods.
Transmission: 700r4
Axle/Gears: 3.23
Re: Injector and cam options

Originally Posted by efiguy
You need to finalize your cam choice before you buy injectors.
What ECM will you be using?
I will be using stock ECM. with a custom chip. I want to learn to burn my own chips. To start with I will get one from aftermarket.(like one from Tpis to match my set up to get close.Thanks for the help
Old 06-30-2015, 07:20 AM
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Join Date: Aug 2009
Location: newport news va.
Posts: 156
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Car: 92 firebird gta
Engine: L98 with minor mods.
Transmission: 700r4
Axle/Gears: 3.23
Re: Injector and cam options

Originally Posted by LB9GTA
Do you know how to tune your EFI on your own? If not, be careful on how big a cam you get.

I had a 400sbc, with a LT1 intake(mini ram)with afr 195's, LT headers, and a 280xfi comp cam. I ran 12.11@111 n/a.
After learning how to burn chips, I know I could have squeaked a couple more tenths out of it. But I spun a main bearing on that engine.

If you have a 350, a 268xfi would probably be a good fit.
Thanks for you help new to mods on EFI (carb guy it's what I know). I will check that one out . Thanks again.
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